#define  _CRT_SECURE_NO_WARNINGS
class Solution
{
public:
    vector<int> missingTwo(vector<int>& nums)
    {
        
        int tmp = 0;
        for (auto x : nums) tmp ^= x;
        for (int i = 1; i <= nums.size() + 2; i++) tmp ^= i;
        
        int diff = 0;
        while (1)
        {
            if (((tmp >> diff) & 1) == 1) break;
            else diff++;
        }
       
        int a = 0, b = 0;
        for (int x : nums)
            if (((x >> diff) & 1) == 1) b ^= x;
            else a ^= x;
        for (int i = 1; i <= nums.size() + 2; i++)
            if (((i >> diff) & 1) == 1) b ^= i;
            else a ^= i;
            return { a, b };
    }
};